"""FeishuLifecycleHandler 单元测试。

覆盖生命周期钩子的 8 个方法（``onInit`` / ``onStart`` / ``onStop`` /
``onPause`` / ``onResume`` / ``onUnload`` / ``onReconfigure`` / ``onFail``），
以及构造器从 config_schema 派生不可热更新键的逻辑。验证状态变迁、
httpx 连接池管理、配置热更新校验（``ConfigRestartRequiredError``）与
``onFail`` 降级回退（logger 不可用时回退 ``stderr``）。
"""

from __future__ import annotations

from unittest.mock import AsyncMock, MagicMock

import httpx
import pytest

from yuxi.channels.contract.dtos.config import ConfigField
from yuxi.channels.contract.errors import ConfigRestartRequiredError
from yuxi.channels.plugins.feishu.lifecycle import FeishuLifecycleHandler

pytestmark = pytest.mark.unit


# ------------------------------------------------------------------
# 桩辅助
# ------------------------------------------------------------------


def _make_logger() -> AsyncMock:
    return AsyncMock()


def _make_config_port() -> AsyncMock:
    return AsyncMock()


def _make_cache_port() -> AsyncMock:
    return AsyncMock()


def _make_config_schema() -> tuple[ConfigField, ...]:
    """构造测试用 config_schema（含可热更新与不可热更新字段）。"""
    return (
        ConfigField(key="app_id", type="string", required=True, hot_reloadable=False),
        ConfigField(key="app_secret", type="string", required=True, hot_reloadable=False),
        ConfigField(key="event_mode", type="enum", required=True, hot_reloadable=False),
        ConfigField(key="bot_name", type="string", required=True, hot_reloadable=True),
        ConfigField(key="bot_open_id", type="string", required=True, hot_reloadable=True),
    )


def _make_handler(
    *,
    config_schema: tuple[ConfigField, ...] | None = None,
) -> FeishuLifecycleHandler:
    return FeishuLifecycleHandler(
        _make_config_port(),
        _make_logger(),
        _make_cache_port(),
        config_schema,
    )


# ------------------------------------------------------------------
# 构造器
# ------------------------------------------------------------------


@pytest.mark.unit
class TestConstructor:
    """FeishuLifecycleHandler 构造器测试。"""

    def test_with_config_schema_derives_restart_keys(self) -> None:
        # Arrange
        schema = _make_config_schema()

        # Act
        handler = _make_handler(config_schema=schema)

        # Assert - 不可热更新键从 schema 派生
        assert "app_id" in handler._restart_required_keys
        assert "app_secret" in handler._restart_required_keys
        assert "event_mode" in handler._restart_required_keys
        assert "bot_name" not in handler._restart_required_keys
        assert "bot_open_id" not in handler._restart_required_keys

    def test_without_config_schema_uses_default_restart_keys(self) -> None:
        # Arrange / Act
        handler = _make_handler(config_schema=None)

        # Assert - 使用默认不可热更新键
        assert "app_id" in handler._restart_required_keys
        assert "app_secret" in handler._restart_required_keys
        assert "event_mode" in handler._restart_required_keys
        assert "webhook_url" in handler._restart_required_keys

    def test_initial_state_not_started(self) -> None:
        # Arrange / Act
        handler = _make_handler()

        # Assert
        assert handler._started is False
        assert handler._http_client is None
        assert handler._last_config is None


# ------------------------------------------------------------------
# onInit / onStart / onStop / onPause / onResume
# ------------------------------------------------------------------


@pytest.mark.unit
class TestLifecycleStateTransitions:
    """生命周期状态变迁测试。"""

    @pytest.mark.asyncio
    async def test_on_init_creates_http_client(self) -> None:
        # Arrange
        handler = _make_handler()

        # Act
        await handler.onInit()

        # Assert
        assert handler._http_client is not None
        assert isinstance(handler._http_client, httpx.AsyncClient)
        await handler._http_client.aclose()

    @pytest.mark.asyncio
    async def test_on_start_sets_started_flag(self) -> None:
        # Arrange
        handler = _make_handler()

        # Act
        await handler.onStart()

        # Assert
        assert handler._started is True

    @pytest.mark.asyncio
    async def test_on_stop_clears_started_flag(self) -> None:
        # Arrange
        handler = _make_handler()
        await handler.onStart()

        # Act
        await handler.onStop()

        # Assert
        assert handler._started is False

    @pytest.mark.asyncio
    async def test_on_pause_clears_started_flag(self) -> None:
        # Arrange
        handler = _make_handler()
        await handler.onStart()

        # Act
        await handler.onPause()

        # Assert
        assert handler._started is False

    @pytest.mark.asyncio
    async def test_on_resume_sets_started_flag(self) -> None:
        # Arrange
        handler = _make_handler()
        await handler.onStart()
        await handler.onPause()

        # Act
        await handler.onResume()

        # Assert
        assert handler._started is True


# ------------------------------------------------------------------
# onUnload
# ------------------------------------------------------------------


@pytest.mark.unit
class TestOnUnload:
    """onUnload 资源释放测试。"""

    @pytest.mark.asyncio
    async def test_unload_closes_http_client(self) -> None:
        # Arrange
        handler = _make_handler()
        await handler.onInit()
        assert handler._http_client is not None

        # Act
        await handler.onUnload()

        # Assert
        assert handler._http_client is None
        assert handler._started is False

    @pytest.mark.asyncio
    async def test_unload_without_init_does_not_raise(self) -> None:
        # Arrange - 未调用 onInit，_http_client 为 None
        handler = _make_handler()

        # Act / Assert - 不抛异常
        await handler.onUnload()

    @pytest.mark.asyncio
    async def test_unload_logs_warning_on_close_failure(self) -> None:
        # Arrange - 注入会抛异常的 mock client
        handler = _make_handler()
        mock_client = AsyncMock()
        mock_client.aclose.side_effect = RuntimeError("close failed")
        handler._http_client = mock_client
        logger = handler._logger

        # Act
        await handler.onUnload()

        # Assert - 关闭失败记录告警，_http_client 仍置 None
        logger.warn.assert_awaited_once()
        assert handler._http_client is None


# ------------------------------------------------------------------
# onReconfigure
# ------------------------------------------------------------------


@pytest.mark.unit
class TestOnReconfigure:
    """onReconfigure 配置热更新校验测试。"""

    @pytest.mark.asyncio
    async def test_first_call_sets_baseline(self) -> None:
        # Arrange
        handler = _make_handler(config_schema=_make_config_schema())
        config = {"app_id": "cli_a", "app_secret": "s", "event_mode": "websocket"}

        # Act
        await handler.onReconfigure(config)

        # Assert
        assert handler._last_config == config

    @pytest.mark.asyncio
    async def test_hot_reloadable_key_change_succeeds(self) -> None:
        # Arrange
        handler = _make_handler(config_schema=_make_config_schema())
        await handler.onReconfigure({
            "app_id": "cli_a", "app_secret": "s", "event_mode": "websocket",
            "bot_name": "Bot1",
        })

        # Act - bot_name 可热更新，变更不应抛异常
        await handler.onReconfigure({
            "app_id": "cli_a", "app_secret": "s", "event_mode": "websocket",
            "bot_name": "Bot2",
        })

        # Assert
        assert handler._last_config["bot_name"] == "Bot2"

    @pytest.mark.asyncio
    async def test_non_hot_reloadable_key_change_raises(self) -> None:
        # Arrange
        handler = _make_handler(config_schema=_make_config_schema())
        await handler.onReconfigure({
            "app_id": "cli_a", "app_secret": "s", "event_mode": "websocket",
        })

        # Act / Assert - app_id 不可热更新，变更抛 ConfigRestartRequiredError
        with pytest.raises(ConfigRestartRequiredError) as exc_info:
            await handler.onReconfigure({
                "app_id": "cli_b", "app_secret": "s", "event_mode": "websocket",
            })
        assert exc_info.value.key == "app_id"

    @pytest.mark.asyncio
    async def test_failed_reconfigure_keeps_old_baseline(self) -> None:
        # Arrange
        handler = _make_handler(config_schema=_make_config_schema())
        original_config = {
            "app_id": "cli_a", "app_secret": "s", "event_mode": "websocket",
        }
        await handler.onReconfigure(dict(original_config))

        # Act - 尝试变更不可热更新键，抛异常
        try:
            await handler.onReconfigure({
                "app_id": "cli_b", "app_secret": "s", "event_mode": "websocket",
            })
        except ConfigRestartRequiredError:
            pass

        # Assert - 基线保持不变
        assert handler._last_config["app_id"] == "cli_a"

    @pytest.mark.asyncio
    async def test_multiple_non_hot_reloadable_keys_checked(self) -> None:
        # Arrange
        handler = _make_handler(config_schema=_make_config_schema())
        await handler.onReconfigure({
            "app_id": "cli_a", "app_secret": "s1", "event_mode": "websocket",
        })

        # Act / Assert - app_secret 变更也抛异常
        with pytest.raises(ConfigRestartRequiredError) as exc_info:
            await handler.onReconfigure({
                "app_id": "cli_a", "app_secret": "s2", "event_mode": "websocket",
            })
        assert exc_info.value.key == "app_secret"

    @pytest.mark.asyncio
    async def test_no_change_succeeds_and_updates_baseline(self) -> None:
        # Arrange
        handler = _make_handler(config_schema=_make_config_schema())
        config = {"app_id": "cli_a", "app_secret": "s", "event_mode": "websocket"}
        await handler.onReconfigure(dict(config))

        # Act - 相同配置不抛异常
        await handler.onReconfigure(dict(config))

        # Assert
        assert handler._last_config == config

    @pytest.mark.asyncio
    async def test_default_restart_keys_used_without_schema(self) -> None:
        # Arrange - 无 config_schema，使用默认键
        handler = _make_handler(config_schema=None)
        await handler.onReconfigure({
            "app_id": "cli_a", "app_secret": "s",
            "event_mode": "websocket", "webhook_url": "",
        })

        # Act / Assert - webhook_url 变更抛异常（默认不可热更新键）
        with pytest.raises(ConfigRestartRequiredError) as exc_info:
            await handler.onReconfigure({
                "app_id": "cli_a", "app_secret": "s",
                "event_mode": "websocket", "webhook_url": "https://hook.x.com",
            })
        assert exc_info.value.key == "webhook_url"


# ------------------------------------------------------------------
# onFail
# ------------------------------------------------------------------


@pytest.mark.unit
class TestOnFail:
    """onFail 失败清理测试。"""

    @pytest.mark.asyncio
    async def test_fail_clears_started_flag(self) -> None:
        # Arrange
        handler = _make_handler()
        await handler.onStart()

        # Act
        await handler.onFail("something went wrong")

        # Assert
        assert handler._started is False

    @pytest.mark.asyncio
    async def test_fail_logs_error_message(self) -> None:
        # Arrange
        handler = _make_handler()
        logger = handler._logger

        # Act
        await handler.onFail("crash")

        # Assert
        logger.error.assert_awaited_once_with("Feishu plugin failed", error="crash")

    @pytest.mark.asyncio
    async def test_fail_does_not_raise(self) -> None:
        # Arrange
        handler = _make_handler()

        # Act / Assert - onFail 不抛异常，不阻断降级流程
        await handler.onFail("error")

    @pytest.mark.asyncio
    async def test_fail_falls_back_to_stderr_when_logger_broken(
        self, monkeypatch: pytest.MonkeyPatch,
    ) -> None:
        # Arrange - logger 不可用
        handler = _make_handler()
        handler._logger.error.side_effect = RuntimeError("logger broken")
        stderr_messages: list[str] = []
        mock_stderr = MagicMock()
        mock_stderr.write = lambda msg: stderr_messages.append(msg)
        monkeypatch.setattr("sys.stderr", mock_stderr)

        # Act - 不抛异常
        await handler.onFail("fatal error")

        # Assert - stderr 收到失败信息
        assert any("fatal error" in msg for msg in stderr_messages)

    @pytest.mark.asyncio
    async def test_fail_falls_back_to_stderr_and_logs_logger_error(
        self, monkeypatch: pytest.MonkeyPatch,
    ) -> None:
        # Arrange - logger 不可用，验证 stderr 包含 logger 错误信息
        handler = _make_handler()
        logger_exc = RuntimeError("logger unavailable")
        handler._logger.error.side_effect = logger_exc
        stderr_messages: list[str] = []
        mock_stderr = MagicMock()
        mock_stderr.write = lambda msg: stderr_messages.append(msg)
        monkeypatch.setattr("sys.stderr", mock_stderr)

        # Act
        await handler.onFail("plugin error")

        # Assert - stderr 同时包含 plugin 错误和 logger 错误
        combined = "".join(stderr_messages)
        assert "plugin error" in combined
        assert "logger unavailable" in combined